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QGIS Python Programming Cookbook, Second Edition

You're reading from   QGIS Python Programming Cookbook, Second Edition Automating geospatial development

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781787124837
Length 464 pages
Edition 2nd Edition
Languages
Tools
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Author (1):
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Joel Lawhead Joel Lawhead
Author Profile Icon Joel Lawhead
Joel Lawhead
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Toc

Table of Contents (10) Chapters Close

Preface 1. Automating QGIS FREE CHAPTER 2. Querying Vector Data 3. Editing Vector Data 4. Using Raster Data 5. Creating Dynamic Maps 6. Composing Static Maps 7. Interacting with the User 8. QGIS Workflows 9. Other Tips and Tricks

Using OpenStreetMap points of interest in QGIS

OpenStreetMap has an API called Overpass that lets you access OSM data dynamically. In this recipe, we'll add some OSM tourism points of interest to a map.

Getting ready

You will need to use the QGIS plugin manager to install the QuickOSM plugin.

You will also need to download the following shapefile and unzip it to your qgis_data/ms directory:

https://github.com/GeospatialPython/Learn/raw/master/MSCoast_geo.zip

How to do it...

We will load our base layer that defines the area of interest. Then, we'll use the Processing Toolbox to build a query for OSM, download the data, and add it to the map:

  1. First, we need to import the processing module:
            import processing 
    
  2. Next, we need to load the base layer:
            lyr = QgsVectorLayer("/qgis_data/ms/MSCoast_geo.shp",
                                 "MS Coast", "ogr") 
    
  3. Then, we'll need the layer extent for the processing algorithms:
            ext = lyr.extent(...
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